docs: def load_all_available_checkers(cls):
          """
          Helper method to retrieve all sub checker classes derived from various
          base classes.
          """
          for x in working_set.iter_entry_points('compliance_checker.suites'):
              try:
                  xl = x.resolve()
                  cls.checkers[':'.join((xl._cc_spec, xl._cc_spec_version))] = xl
              # TODO: remove this once all checkers move over to the new
              #       _cc_spec, _cc_spec_version
              except AttributeError:
                  # if there are versioned classes, it will get overwritten by the
                  # latest version later.  If there are not, it will be assigned
                  # the checker as the main class
                  # TODO: nix name attribute in plugins.  Keeping in for now
                  #       to provide backwards compatibility
                  cls.checkers[getattr(xl, 'name', None) or xl._cc_spec] = xl
  
              except Exception as e:
                  print("Could not load", x, ":", e, file=sys.stderr)
          # find the latest version of versioned checkers and set that as the
          # default checker for compliance checker if no version is specified
          ver_checkers = sorted([c.split(':', 1) for c
                                 in cls.checkers if ':' in c])
          for spec, versions in itertools.groupby(ver_checkers, itemgetter(0)):
              version_nums = [v[-1] for v in versions]
              try:
                  latest_version = str(max(StrictVersion(v) for v
                                           in version_nums))
              # if the version can't be parsed as a StrictVersion, parse
              # according to character collation
              except ValueError:
                  latest_version = max(version_nums)
              cls.checkers[spec] = cls.checkers[spec + ':latest'] = \
                  cls.checkers[':'.join((spec, latest_version))]